[Cryptography] Public-key auth as envisaged by first-year science students

[Ron Garret]

On Aug 10, 2016, at 4:06 AM, Peter Gutmann <pgut001 at cs.auckland.ac.nz> wrote:

> I've been helping out with a student session where a group of first-year
> science students get exposed to various interesting things outside their usual
> field of study.  This year, one of the exercises we set was to give them an
> overview of DH via the paint-mixing analogy, explain what a MITM was, and ask
> them to come up with a means of dealing with it.  This is what they came up
> with...
> 
> Location-limited channels: Detect how long it takes for messages to go back
>  and forth, the MITM will introduce delays.

A side-channel defense against an attack!  I love it!

rg